Portable air grinder



FIG. 1 is a front view of my portable air grinder;

FIG. 2 is a side view of my portable air grinder;

FIG. 3 is a rear view of my portable air grinder;

FIG. 4 is another side view of my portable air grinder;

FIG. 5 is a top view of my portable air grinder;

FIG. 6 is a bottom view of my portable air grinder; and,

FIG. 7 is a perspective view of my portable air grinder. 

The ornamental design for a portable air grinder, as shown and described. 